The Insurance Institute for Highway Safety reports that the Ford F-150 and Toyota Tundra are the only large pickup trucks on the market to earn their top rating of “GOOD” in roof strength evaluations.

Roof strength is an important safety feature because, in rollover motor vehicle accidents, the roof protects the vehicle occupants from serious injuries. According to the IIHS, 10,000 people are killed every year in rollover car accidents. The Institute has found that by increasing the roof strength, there is an estimated 50 percent reduction in serious and fatal injuries in rollover motor vehicle accidents.

The IIHS tests a vehicle’s roof strength by pushing a metal plate against one corner of a vehicle’s roof. The maximum force before the roof is crushed 5 inches is measured and compared with the vehicles weight.

The Nisan Titan received an Acceptable rating while the Chevrolet Silverado and Dodge Ram only received a Marginal rating.